ADWAR

Set to 2 different clues across 3 published puzzles, most often “Negative campaign feature” — The New York Times, Sunday, 23 April 2006.

5 letters

Every clue on record, most used first

Negative campaign feature2 times
The New York Times — Sunday, 23 April 2006
Exchange of TV smears, maybeonce
The New York Times — Wednesday, 3 February 2010